Water purification additives containing biaguanide chemicals are sold under the trademarked
names of Baquacil and Soft Swim. The active ingredient in these products is known as biaguanide.
Unlike chlorine, biaguanide is not an oxidizer, so it does not irritate your body by reacting or
"burning up" organic contaminants the way chlorine does.
Biaguanide does provide a higher quality of water than chlorine treatment but it is very, very
expensive. Sometimes costing several times more than chlorine.
Biaguanide needs to be purchased in bulky containers and needs to be manually added to the
pool water regularly.
After prolonged use of biaguanide, some pool owners complain that it takes more and more of the
product to achieve the desired water quality. Pool owners also mention that the product causes a
unique odor in the water after extended use.